There are two Python 2.7 installers available at python.org a 32 bit
version for MacOS X 10.3.9 and later and a 64 bit version for Mac OS X
10.5 and later.
There is one numpy 1.5.0 binary installer for Mac Python 2.7. Which Mac
python was it built for? (Or if it is compatible with both, how did you
manage that?).
-- Russell